/*
 *  Copyright 2004 Blandware (http://www.blandware.com)
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package com.blandware.atleap.webapp.action.core.contentResource;

import com.blandware.atleap.webapp.action.core.BaseAction;
import com.blandware.atleap.webapp.util.core.WebappConstants;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.commons.validator.GenericValidator;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 * <p>Returns page with form to update content resource
 * </p>
 * <p><a href="CallUpdateContentResourceAction.java.html"><i>View Source</i></a></p>
 * <p/>
 *
 * @author Andrey Grebnev <a href="mailto:andrey.grebnev@blandware.com">&lt;andrey.grebnev@blandware.com&gt;</a>
 * @author Sergey Zubtsovskiy <a href="mailto:sergey.zubtsovskiy@blandware.com">&lt;sergey.zubtsovskiy@blandware.com&gt;</a>
 * @author Roman Puchkovskiy <a href="mailto:roman.puchkovskiy@blandware.com">
 *         &lt;roman.puchkovskiy@blandware.com&gt;</a>
 * @version $Revision: 1.18 $ $Date: 2007/04/04 14:06:25 $
 * @struts.action name="uploadContentResourceForm"
 * path="/core/contentResource/callUpdate"
 * scope="request"
 * input="listContentResources"
 * validate="false"
 * roles="core-contentResource-update, core-contentResource-view"
 * @struts.action-forward name="updateContentResource"
 * path=".core.contentResource.update"
 * @struts.action-forward name="listContentResources"
 * path="/core/contentResource/list.do"
 * redirect="true"
 */
public final class CallUpdateContentResourceAction extends BaseAction {

	/**
	 * @param mapping  The ActionMapping used to select this instance
	 * @param form     The optional ActionForm bean for this request (if any)
	 * @param request  The HTTP request we are proceeding
	 * @param response The HTTP response we are creating
	 * @return an ActionForward instance describing where and how
	 *         control should be forwarded, or null if response
	 *         has already been completed
	 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
	                             HttpServletRequest request, HttpServletResponse response) throws Exception {
        HttpSession session = request.getSession();

        // Check whether it's normal edit (from list of content resources) or
		// it was invoked from context menu
		String redirectUrl = request.getParameter("redirectUrl");
        if ( !GenericValidator.isBlankOrNull(redirectUrl) ) {
			// It was invoked from context menu
			session.setAttribute(WebappConstants.REDIRECT_URL_KEY, redirectUrl);
		}

        if ( isCancelled(request) ) {
			resetToken(request);
            if ( !GenericValidator.isBlankOrNull(redirectUrl) ) {
                session.removeAttribute(WebappConstants.REDIRECT_URL_KEY);
                return new ActionForward(redirectUrl, true);
            }
            return mapping.findForward("listContentResources");
		}

        if (!request.isUserInRole("core-contentResource-update")) {
			response.sendError(HttpServletResponse.SC_FORBIDDEN);
			return null;
        }

		Long contentResourceId = null;
        if ( request.getParameter("id") != null ) {
			contentResourceId = Long.valueOf(request.getParameter("id"));
		} else if ( session.getAttribute(WebappConstants.CONTENT_RESOURCE_ID_KEY) != null ) {
			contentResourceId = (Long) session.getAttribute(WebappConstants.CONTENT_RESOURCE_ID_KEY);
		} else {
			if ( log.isWarnEnabled() ) {
				log.warn("Missing content resource ID");
			}
            if ( !GenericValidator.isBlankOrNull(redirectUrl) ) {
                session.removeAttribute(WebappConstants.REDIRECT_URL_KEY);
                return new ActionForward(redirectUrl, true);
            }
            return mapping.findForward("listContentResources");
		}

		//put into session because the form with file field does not populate id if some error is occurred e.g. big file size
		session.setAttribute(WebappConstants.CONTENT_RESOURCE_ID_KEY, contentResourceId);
		saveToken(request);
		return mapping.findForward("updateContentResource");
	}
}